If your definition of an innings eater is 150 innings at least, then you can easily get by with a cheap, veteran on an MLB deal, a couple of MLB vets on minor league deals for depth in case the other guy gets hurt, and/or the Jordan Stephens and Jordan Guerreros of the world to give them a look at the MLB level. Assuming his finger is fine, Santana should be a decent innings eater himself. I don't expect much out of Nova and expect him to be cut for Cease in July/August personally.
Honestly, I would prefer James Shields for a couple mill over Nova. Shields even pitches more and will go at least 6 even if he's given up 4-5 runs.